US Bridges

US-17 (SR-35) SB over Thornton Branch

Good

DeSoto County, Florida · 0.2 MI South of CR-761 · Structure no. 040050

Built
1999
26 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
11,400
2024 count
Owner
State
State Highway Agency

About this bridge

US-17 (SR-35) SB over Thornton Branch is a concrete continuous slab carrying US-17 (SR-35) SB over Thornton Branch in DeSoto County, Florida. It was built in 1999, so it is 26 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 11,400 vehicles a day, roughly 20% of them trucks, projected to reach 14,250 by 2044. The structure is 90 ft (27.5 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS-17 (SR-35) SB
CrossesThornton Branch
Location0.2 MI South of CR-761
RouteU.S. Route 17
CountyDeSoto County
StateFlorida
Coordinates27.06462, -81.9583
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating64.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length90 ft (27.5 m)
Longest span34 ft (10.4 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,400 (2024)
Projected traffic14,250 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US-17 (SR-35) SB over Thornton Branch built?

It was built in 1999, making it 26 years old in 2025.

What condition is US-17 (SR-35) SB over Thornton Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does US-17 (SR-35) SB over Thornton Branch carry?

About 11,400 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is US-17 (SR-35) SB over Thornton Branch?

The structure is 90 ft (27.5 m) long with a longest span of 34 ft (10.4 m) and a deck 43 ft wide.

Who owns US-17 (SR-35) SB over Thornton Branch?

It is owned by the State Highway Agency.